12398545 has 12 divisors (see below), whose sum is σ = 15704820. Its totient is φ = 9395424.

The previous prime is 12398537. The next prime is 12398549. The reversal of 12398545 is 54589321.

It can be written as a sum of positive squares in 2 ways, for example, as 1718721 + 10679824 = 1311^2 + 3268^2 .

It is not a de Polignac number, because 12398545 - 2³ = 12398537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12398549) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1630 + ... + 5239.

It is an arithmetic number, because the mean of its divisors is an integer number (1308735).

Almost surely, 2^12398545 is an apocalyptic number.

It is an amenable number.

12398545 is a deficient number, since it is larger than the sum of its proper divisors (3306275).

12398545 is an equidigital number, since it uses as much as digits as its factorization.

12398545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6912 (or 6893 counting only the distinct ones).

The product of its digits is 43200, while the sum is 37.

The square root of 12398545 is about 3521.1567701538. The cubic root of 12398545 is about 231.4498520687.

The spelling of 12398545 in words is "twelve million, three hundred ninety-eight thousand, five hundred forty-five".